<p>记曲线<img src="https://file.gaojiufeng.cn/learnAppQuestion/24/32/2432ce49de368b460c4be4a3da8e5827.jpg" style="width: 100%;height: auto;">与直线<img src="https://file.gaojiufeng.cn/learnAppQuestion/c8/f1/c8f17a152ffa671e2ed857e8f75cb7ac.jpg" style="width: 100%;height: auto;">所围成的平面图形为<img src="https://file.gaojiufeng.cn/learnAppQuestion/8c/c0/8cc0a7c75257b1a24f6be13af59423bb.jpg" style="width: 100%;height: auto;">（如图中阴影部分所示）.[图1]<img src="https://file.gaojiufeng.cn/learnAppQuestion/2a/11/2a11a6be4c517a9bae66ee7cb03367b7.jpg" style="width: 100%;height: auto;">求<img src="https://file.gaojiufeng.cn/learnAppQuestion/8c/c0/8cc0a7c75257b1a24f6be13af59423bb.jpg" style="width: 100%;height: auto;">绕<img src="https://file.gaojiufeng.cn/learnAppQuestion/09/54/09540c8c5bcbd704040ed4c91474d65c.jpg" style="width: 100%;height: auto;">轴旋转一周所得旋转体的体积<img src="https://file.gaojiufeng.cn/learnAppQuestion/96/ab/96ab1d86ad3e4ee0e858b1dede7ee6be.jpg" style="width: 100%;height: auto;">.</p>